Idle stabilization unit

Post by **OB1** » 16 Sep 2006, 19:52

Hi all ,have got a 1.9 dg engine (carb) lump in a 1983 t25 - i was wondering if im able to run the vehicle by connecting the two round 3 pin terminal plugs from the idle stabilization unit and use it all the time this way or will it do some damage ?-
I bow to your superior knowledge because i havnt got a clue
Cluelessly yours
OB1

Post by **Hacksawbob** » 16 Sep 2006, 20:57

Yes you can. The ISU is known to cause problems and its stabalising qualities would not be required at anything above idleing speed. They can go wrong and the only way to test it is to replace it with a known good unit. (I dont think bentley has a test procedure correct if wrong) So if you idle OK without your set.

Post by **OB1** » 17 Sep 2006, 00:04

OK Cheers i'll give it a go
OB1

Post by **strangely brown** » 17 Sep 2006, 09:27

Hi Obi1,
if your interested i have got a 251-906-083A brand new unit (still in the box) numbers differ slightly from yours, i dont know if this is a superceded
unit, somebody might know. If it is a superceded unit and your interested make me an offer.

S.B.

Post by **toomanytoys** » 17 Sep 2006, 10:58

Mmmm never seen an idle stab on a DG (doesnt mean it wasnt fitted though) but I thought they were only fitted to the Aircooled ones....
It could be that so;eone has fitted an Aircooled distributor too, if a 1.6 then ok, but if off a 2L then advance curve will be all out of shape, whats the part number on the dizzy?

Post by **HarryMann** » 17 Sep 2006, 10:59

Recent topic on 1.9 Vs 2.1 advance curves, with a graph.... if its of interest

Post by **toomanytoys** » 17 Sep 2006, 11:08

Yes it would be to me Clive, post or mail it!

Post by **HarryMann** » 17 Sep 2006, 12:08

http://www.club80-90.co.uk/wiki/index.p ... nce_curves

Thought the SteveW thread was longer than that, hope it hasn't been pruned, mayeb I'm looking at wrong one, but glad I put this in the Wiki at the time

People tend to jump to conclusions about the static iming, being either advanced or retarded when in fact its due to the vac/advance basic settings coming into play at difefertn throttle positions (i think)

Post by **OB1** » 17 Sep 2006, 18:43

toomanytoys wrote:Mmmm never seen an idle stab on a DG (doesnt mean it wasnt fitted though) but I thought they were only fitted to the Aircooled ones....
It could be that so;eone has fitted an Aircooled distributor too, if a 1.6 then ok, but if off a 2L then advance curve will be all out of shape, whats the part number on the dizzy?

Have looked at dizzy and part Nos on body are
top row-Z414
Middle -0 239 023 013
Bottom 025 905 205 B
is this what you need ?
OB1

Post by **toomanytoys** » 17 Sep 2006, 19:42

yep... will have a look at my list....... now where did I put it???

Post by **skell** » 18 Sep 2006, 12:48

DF's had idle stabiliser, I plugged leads to it together when I installed a DG because as far as I could tell DG's dont have them

Post by **OB1** » 18 Sep 2006, 22:50

Is there a chassis code No which would tell me which engine and hopefully wiring set up my unit is supposed to have ?
OB1

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Idle stabilization unit

Idle stabilization unit

Idle Stabilizer